542531161 has 4 divisors (see below), whose sum is σ = 552767652. Its totient is φ = 532294672.

The previous prime is 542531141. The next prime is 542531167. The reversal of 542531161 is 161135245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 315275536 + 227255625 = 17756^2 + 15075^2 .

It is a cyclic number.

It is not a de Polignac number, because 542531161 - 2⁹ = 542530649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542531167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5118166 + ... + 5118271.

It is an arithmetic number, because the mean of its divisors is an integer number (138191913).

Almost surely, 2^542531161 is an apocalyptic number.

It is an amenable number.

542531161 is a deficient number, since it is larger than the sum of its proper divisors (10236491).

542531161 is a wasteful number, since it uses less digits than its factorization.

542531161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10236490.

The product of its digits is 3600, while the sum is 28.

The square root of 542531161 is about 23292.2983194016. The cubic root of 542531161 is about 815.5956407003.

The spelling of 542531161 in words is "five hundred forty-two million, five hundred thirty-one thousand, one hundred sixty-one".